1.Easy to use

2.Waterproof, packable

3.Exist mold. You don't need to open new mold yet still can adjust some details

1.100% water tight waterproof backpack for men.

2.Can be used as travel and business backpack.

3.Different colors available.

4.Exist molds

1.Ocean pack dry bag is available in different sizes 5L/10L/20L/30L/40L.

2.Multi-exist molds for you to choose. You don't need to spend money to develop molds